/**
 * @author 余鹏龙
 * @version 1.0
 */

class B {
    public int Func() {
        System.out.print("B");
        return 0;
    }

class D extends B {
    @Override
    public int Func() {
        System.out.print("D");
        return 0;
    }
}

}
public class Test {
    public static void main(String[] args) {
        B a = new B();
        //B b = new D();
        a.Func();
        //b.Func();
    }
}
